Transit devices and system including a slow protocol filter and methods of transmitting information within a transit device or system using a slow protocol filter

Abstract

A transit device and system that include a first link configured to receive a plurality of packets, and a second link communicatively coupled to the first link via a slow protocol filter. The plurality of packets include a first type of packet (e.g., data packets) and a second type of packet (e.g., slow protocol control packets). The transit device also includes a slow protocol filter that couples the first link to the second link, with the slow protocol filter being coupled to a local slow protocol client (e.g., local host CPU). Moreover, the slow protocol filter is configured to receive the plurality of packets from the first link, and to determine whether each of the plurality of packets is of the first type or the second type. The slow protocol filter also is configured to transmit each of the plurality of packets that are of the first type to the second link, and to transmit each of the plurality of packets that are the second type to the local slow protocol client. The slow protocol filter is also configured to transmit packets of second type sourced by the local slow protocol client (local host CPU) to either the first or the second link based on the destination address. Thus slow protocol filter offers data path between two remote peers and the local host for exchange of commands and responses.